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KV-21PS2/21RS22C/21RS50/21RS50C/21SD2 (RM-Y145}
KV-21 PM2/21R22/21R22C/21RD2 (RM-Y146)
5-2.
A BOARD ADJUSTMENTS
RF AGC ADJUSTMENT (IF BLOCK VR)
1. Input a color-bar signal.
2. Adjust AGC VR of TU10I so that snow, noise, and
cross-modulation disappear from the picture.
3. Verify picture quality on each channel.
H. FREQUENCY ADJUSTMENT
1. Input a monoscope signal.
2. Set to Service adjustment Mode.
3. Connect a frequency counter to base of Q550 (TP-86 H.
DRIVE).
4. Select the item of AFC, set to 3 level (free run).
5. Check H. Frequency for the 15800 ± 100 Hz.
6. Select the item of AFC again, adjust the level ''1
7. Write into the memory by pressing
[MUTING! then [ENTER 1 .
V. FREQUENCY ADJUSTMENT
1. Select video 1 with no signal input.
2. Set the conditions with standard setting.
3. Connect the frequency counter across CN501 VDY (+)
(pin 6) connector and ground.
4. Check V. Frequency for the 60 ± 2 Hz.
6. Connect an oscilloscope to CN703 Pin © (R OUT) of C
board and ground.
7. Select SCON with [T] and @ .
8. Adjust with S and [6j for: 1.8 ± 0.05 Vp-p.
9. Reset the item 1DCOL to "0" level.
10. Write the memory by pressing [MUTING! then [ENTER
11
Return the following back to normal after adjustment.
PICTURE. .
MAX
COLOR
. .
CENTER
BRIGHT
. .
CENTER
R ON
. .ON (1)
G ON
. .
ON (1)
B ON
. .
ON (1)
SUB CONTRAST ADJUSTMENT (SCON)
1. Input a color-bar signal.
2. Select the red color.
3. Set to Service adjustment Mode.
4. Select the item DCOL to "I" level.
5. Set the conditions as follows.
PICTURE .... .
MAX
COLOR
.... .
MIN
BRIGHT
_ .
CENTER
R ON
.... .
ON (1)
G ON
.... .
OFF (0)
B ON
.
OFF (0)
1
ON
/0 OFF
DISPLAY POSITION ADJUSTMENT (D1SP)
1. Input a color-bar signal.
2. Set to Service adjustment Mode.
3. Select DISP with [U and @ .
4. Adjust with [3] and [6] for adjustment of characters to center .
5. Write the memory by pressing [MUTINGl then [ENTER[.
6. Check if the text is displayed on the screen.
SERVICE
DISP
10
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